Portable cordless sprayer

ABSTRACT

A portable cordless sprayer comprises a housing structure which detachably secures to a liquid container. The housing structure provides a handle which mounts a control switch. The housing also supports a compartment which is suspended within the container and houses a pump and batteries. The liquid is sprayed through a conduit and nozzle arrangement which can be stored on the housing. The pump has a bypass check valve and the nozzle has a shut-off valve with operating pressures selected so that the pump will be primed with the nozzle closed and before spraying commences and so that the nozzle closes quickly when spraying stops. The liquid container may be refilled when depleted. However, in the preferred embodiment, the nozzle operates bidirectionally and the pump is reversible which enables the pump to be used as a means to refill the container to minimize contact with insecticides, et cetera.

United States Patent [191 Jones et al.

[451 Sept. 9, 1975 PORTABLE CORDLESS SPRAYER [73] Assignee: Disston,lnc., Danville, Va.

[22] Filed: Jan. 9, l975 [211 App]. No.: 539,867

Primary Examiner-M. Henson Wood, Jr. Assistant Examiner-Michael MarAttorney, Agent, or Firm-B. B. Olive [57] ABSTRACT A portable cordlesssprayer comprises a housing structure which detachably secures to aliquid container. The housing structure provides a handle which mounts acontrol switch. The housing also supports a compartment which issuspended within the container and houses a pump and batteries. Theliquid is sprayed through a conduit and nozzle arrangement which can bestored on the housing. The pump has a bypass check valve and the nozzlehas a shut-off valve with operating pressures selected so that the pumpwill be primed with the nozzle closed and before spraying commences andso that the nozzle closes quickly when spraying stops. The liquidcontainer may be refilled when depleted. However, in the preferredembodiment, the nozzle operates bidirectionally and the pump isreversible which enables the pump to be used as a means to refill thecontainer to minimize Contact with insecticides, et cetera.

6 Claims, 12 Drawing Figures PORTABLE CORDLESS SPRAYER BACKGROUND OF THEINVENTION 1. Field of the Invention This invention relates to sprayersand particularly to cordless, battery-powered garden and yard sprayers.

2. Description of the Prior Art Conventional portable sprayers fordispensing liquids, e.g., insecticides, pesticides, and the like, havegenerally comprised a manual air pump and an attached receptacle.Portable paint sprayers have used A.C. driven pumps, compressed airtanks, and the like, as a pressure source. More recently, cordlessSprayers have appeared in the market and which use batteryoperated pumpsunder the tradenames Burgess", Black and Decker", *Hudson", Tudor andRockwell".

Typical prior art includes the following US. Pat.

Nos.: 1,411,513; 2,257,725; 2,651,545; 2,737,413; 2,752,200; 2,923,481;2,969,809; 2,980,343; 3,002,599; 3,072,345; 3,140,830; 3,219,278;

3,524,593; and 3,670,966.

The available cordless sprayers offer many advantages; however, anoptimum arrangement has not been achieved and there remain manydisadvantages such as poor weight balance, nozzle leakage, poorrefilling arrangements and substantial lack of versatility for the manyapplications and conditions in which cordless sprayers can be used.

SUMMARY OF THE INVENTION The present invention covers a cordless,batterypowered garden and yard sprayer. The sprayer includes a balancedhandle and housing combination having a horizontally-disposed externalrecess and a container or reservoir for liquid storage. The pump, motorand batteries are stored in a cup-like compartment which is suspended inthe container. A spraying wand assembly employed in the inventionapparatus includes a flexible conduit having a rigid terminal outer endnozzle portion. The flexible portion connects to the reservoir, througha self-priming pump and reversible drive motor arrangement and may beeither coiled around the sprayer housing in the mentioned recess withthe rigid portion clamped to the housing for spraying in such clampedposition or may be used in a fully uncoiled position. The spraying wandnozzle may be adjusted for the type spray or stream condition desired.

A fluid discharge system which minimizes leakage includes a bypassarrangement at the pump and a ball check valve at the nozzle coordinatedwith respect to their operating pressures such that the pump operatesthrough the bypass until fully primed and after priming, the fluidpressure opens the nozzle check valve and maintains the nozzle checkvalve open so long as, but only so long as, the pump operates.

In the preferred embodiment, the nozzle operates bidirectionally and thepump is reversible. By reversing the motor direction, the pump andnozzle can be used as a means of replenishing the fluid supply. Thenozzle has a hole near the spray end and a slidablc tube which can bemoved rearwardly to expose this hole such that the nozzle can beimmersed in a liquid supply and draw replacement fluid into thecontainer.

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DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of the portablecordless sprayer of the invention.

FIG. 2 is an exploded pictorial view of the sprayer.

FIG. 3 is an elevation section view taken substantially through thecenter of the sprayer with the wire leads having been omitted from theview for clarity.

FIG. 4 is a top plan view of the sprayer with portions thereof cut awayfor clarity and illustration.

FIG. 5 is a fragmentary side elevation section view of the spraying wandhandle.

FIG. 6 is a fragmentary side elevation view of the pump and bypass ballcheck valve used in the sprayer.

FIG. 7 is a fragmentary side elevation section view of the pump andreversible drive motor used in the sprayer.

FIG. 8 is a side elevation view of the container cup assembly used inthe sprayer.

FIG. 9 is a plan view of the container cup assembly used in the sprayer.

FIG. 10 is a side elevation section view through the nozzle of thepreferred embodiment adapted both for spraying and refilling.

FIG. 11 is a fragmentary end elevation section view illustrating thelocking relationship of the container and housing and illustrating therigid tube clamp.

FIG. 12 is a side elevation section view through an alternative typenozzle used for spraying only and slightly enlarged.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to the drawingsand particularly to FIG. 1, a portable cordless garden and yard sprayerincorporating the features of the invention is designated generally bynumeral 10. The sprayer includes a container 11 serving as a reservoirfor the liquid to be sprayed. Container 11 receives in a lockingrelation a housing designated generally by numeral 12. A pump assemblygenerally designated 13 receives a flexible tube 14 which in turnreceives a wand assembly generally designated 15 and a nozzle assemblygenerally designated 16.

Referring particularly to FIGS. 2 and 3 for a descrip' tion of housing12, left housing section 20 is designed to, when ready for assembly,mate with right housing section 21 by means of screws 22 which mount inscrew insets 23 provided in the left housing section 20. Housing 12 ispreferably molded of lightweight plastic and provides a substantiallyhorizontal tubular compartment forming a handle portion 24 as best shownin FIG. 3 and which provides room for internal mounting of the controlswitch 25 and associated wiring 26 (FIG. 2). Handle portion 24, made upof left and right housing sections 20, 2], has a slot molded into eachhousing section. Slot 29 of section 20 and slot 30 of section 21, whenplated together, mate and form an opening which receives switch button31 but retains button 3] within the opening as it slides back and forthto its extreme positions. Button 31 rests against the top inside wall ofhandle 24 and is held in a neutral, non-operating position by guides 32,33, 34 of section 20 and similar guides 35, 36, 37, not shown, ofsection 21. Switch 25 mounts in position on guides 38, 39 of section 20and similar guides 40, 41 (not shown) of section 21. Button 31 is moldedwith a hollow cavity which receives a coil spring 42 and a switch button43 to which spring 42 connects. Switch is a reversible switch and can beactuated by pushing down on button 31 so that it clears guides 32, 33,34, 35, 36, 37. Button 31 can either be pushed forward corresponding toa spray position or pulled backward to a refilling position.

Rearwardly of the handle compartment is a terminal 27 suited to connectto an AC source through recharging unit 28 as shown in FIG. 2. Once allparts have been assembled within handle portion 24 and screws 22tightened into right housing section 21, wiring 26 is allowed to extendfrom the bottom of housing 12. Handle portion 24 is designed to receivethe flanges or guides 130, 131, 132 within slots I33, 134, 135 of handle24. A one-quarter turn of handle 24 locks container 11 in place.

FIGS. 8 and 9 illustrate a container cup 47 which is received by guideslot 48 of section 20 and guide slot 49 (not shown) of section 21. Cup47 has an open top and is a molded plastic unit with top flanges 50, 51which slide fit into guide slots 48, 49. Flange 51 has a slot 52 moldedinto flange 51 as more fully described later in the description. Cup 47is substantially circular and is slightly tapered from the top to thebottom so that it easily enters opening 17 in container 11 and as cap 47slides into opening 17 its contacting diameter increases and preferablyprovides a tight seal between cup 47 and opening 17. Bottom 53 has apair of openings 54, 55 molded therein. Cavity 47a of cup 47 is ofsufficient depth and diameter to adequately house pump assembly 13,batteries 56, and wiring 58.

The description will now shift to a description of pump assembly 13 andhow it is mounted within cavity 47a of cup 47. Pump assembly 13, seeFIG. 7, is composed of a reversible drive motor 59 which has motor leads60, 61 extending from the base 62 of motor 59 and connected by suitablewiring to the switch and battery. Motor 59 has a drive shaft 63 whichextends therefrom and upon which a washer or spacer 64 is mounted. Motor59 has a raised boss 65 which is received by a mating boss 66 molded asan integral member of a pump base member 67. Pump base member 67 mountson shaft 63 through hole 68, see FIG. 2. A driven gear 69 is pressedonto shaft 63. Base 67 has a stud 70 pressed into a hole 71 in base 67.A second gear or idler gear 72 is then pressed onto stud 70. Pumphousing 75 has a hollowed out cavity 76 which has a pair of groovedslots 77, 78 for aligning a pressure plate 79 of the same configurationwhich is placed into cavity 76 and is brought to bear against the topsof gears 69, 72. Plate 79 is constantly pressed towards gears 69, 72 bycoil spring 80. Once housing 75 is in place, screws 81, 82 are placedthrough holes 85a, 85.: of housing 75 and holes 86a, 86b of bottom plate67. Screws 81. 82 are then tightened down in threaded holes 87, 88, notshown, in drive motor 59. Gears 69, 72 are relatively small and haverelatively few gear teeth, e.g., 9 teeth per gear. Pressure plate 79 andplate spring 80 complete the small but highly efficient gear pumpassembly.

Pump outlet 89 is molded as an integral part of pump housing 75. Outlet89 opens into cavity 76 so that as liquid is pumped through gears 69,72. it will be forced out into outlet 89 which passes through hole 90 inright housing section 21. A second or by-pass outlet 91 opens intocavity 76 so that should pump 13 not he primed. pump 13 will primeitself since air will initially be forced through outlet 91, throughflexible tube 911:

and back into the container 1] until pump 13 is fully primed. Then.liquid will be drawn into cavity 76 by pump 13 through pump inlet 95 andthrough tube 96 into outlet 89. Further advantages will be pointed uplater in the description.

In both the preferred and alternate embodiments, the nozzle check valveoperating pressure and the bypass piping check valve operating pressureare selected such that until the pump becomes fully primed insufficientpressure is developed to open the nozzle valvev However, once primed thenozzle check valve opens and remains open so long as the pump isenergized. However, when the switch is moved from on" to off" and thepump is electrically disconnected, the nozzle substan tially immediatelyshuts off and prevents dripping and syphoning effects which have beenexperienced with prior art devices and which can be hazardous withinsecticides. and the like.

FIGS. 24, 6-9, l0 and 12 illustrate the pump and nozzle arrangementsused in the invention. Two features of the invention offer specialadvantages in actual use of the sprayer. One feature allows the pump tobe primed before any spraying commences and the other feature providesfor minimizing leaks and pressure losses in the nozzle. With respect topriming, when the pump 13 is initially started air only may be pumpedand ball 116 (as seen in FIG. 10 for the reversible flow em bodiment) orball 144 (as seen in FIG. 12 for the nonreversible flow embodiment), asthe case may be, is in a closed seated position which prevents theescape of such air through the nozzle. Just prior to pumping beingstarted, ball 93 (FIG. 6) will be against its seat 94. However, oncepump 13 is operating, the air pres' sure forces ball 93 off seat 94 andtowards seat 94a which allows the air to escape around ball 93, throughseat 94a. through outlet 91 (FIG. 6) into return tube 91, into tube 55(FIGS. 2, 8, 9) and back into Container 11. As the pumping sequencecontinues, liquid begins to flow which increases the pressure at theoutlet of pump 13. This increasing pressure then rapidly builds up andcauses ball 93 to seat against seat 94a which prevents further bypassingof air or liquid through tube 910. As pressure continues to rise, asufficient pressure is eventually developed to cause ball 116 (FIG. 10)or ball 144 (FIG. 12), as the case may be, to open and spraying tocommence. In both embodiments the valve spring loading, the diameters ofthe respective balls 116, 144, and the diameters of the passageways oftheir respective seats I15, 143 are purposely chosen so that a greaterpressure is required to open the respective nozzle than is required tomaintain it open. Thus. initial priming is achieved before sprayingcommences and equally important maximum protection against leaks isachieved with minimum pressure loss during operation. With theseobjectives in mind, those skilled in the art may readily determineappropriate spring loading. ball diameters and seat passageway diametersto achieve the operation described. An extremely small vent hole 97 islocated in the top wall of container 1 I and allows air to get back intocontainer 11 for venting purposes.

Once liquid is being forced. through pump 13, through outlet 89 and theninto tube 14, the liquid is directed to the area to be sprayed throughflexible tube 14 which can be directed as required. FIGS. 2, 5 and 9best illustrate wand 15 and nozzle 16. In addition to being connected tooutlet 89, it will be noticed that tube 14 connects at its other end toa rigid tube 100 (see FIG. 5). Rigid tube 100 passes through handlewhich is composed of left section 101 and right section 102 which areheld together by screws 103, 104. Handle 15 is used when the user needsto spray an area where the complete unit 10 cannot be used due tolimited access, height, etc. At the other end of rigid tube 100 is anangled portion 105. Nozzle assembly 16 is secured to this end of tube100 in a suitable threaded manner. FIGS. 2 and 10 illustrate thepreferred embodiment of nozzle assembly 16. A collar 106 is slid ablyreceived by nozzle body 107. Collar 106 has a pair of slots 108 whichreceive flexible tabs 110 so that tabs 110 ride in slots 108. One sideof body 107 is relatively flat so that when collar 106 is slid forward,a passageway 112 is opened up between body 107 and the internal wall ofcollar 106. Body 107 has a central bore 113 extending its entire length.At a predetermined dis tance along the length of body 107 is a hole 114which extends through the walls of body 107 and opens bore 113. Asliquid passes through passageway 112 and down to hole 114, it is drawnthrough hole 114 into bore 113 and then back into tube 14 untilcontainer 11 is filled with liquid. Bore 113 is of a larger diameter atits forward end than at its rearward end 113a, the two ends beingseparated by an angled wall 115. Angled wall 115 provides a seatingsurface for ball 116 so that liquid flow through bore 113 and 11311 canbe sealed off by ball 116.

Ball 116 is spring loaded by coil spring 117 which rests against ball116. As previously explained, the op erating pressure of spring 117 andthe diameters of ball 116 and bore 113a are selected with theprimingspraying sequence in mind. The diameter of the ball 116 and thediameter of the passageway, i.e., bore 11311, which it closes are chosensuch that the pressure to open ball 116 is much greater than thepressure re quired to keep it open. In this way, the pressure losses,once ball 116 has opened, are minimized and in like fashion the pressureto initially open ball 116 is maximized. Efficiency is gained in thedescribed nozzle ball check design in that a larger pressure is requiredto open ball 116 than that required to keep it open. This means thatball 116 opens reluctantly which gives maximum protection against leaksbut once it has opened when pump 13 starts, a fairly small pressure lossis expended to keep it open.

The forward end of body 106 is externally threaded with threads 118which allow nozzle body 119 to be screwed thereon by means of matinginternal screw threads 120. Nozzle body 119 also has a central bore 121which aligns with bore 113 and further provides for a liquid paththrough nozzle assembly 16. The forward end 122 of nozzle body 119 issolid and prevents further forward flow of liquid. An elongated hole 123extends through end 122 of body 119 and communicates with bore 121 sothat liquid coming through bores 113 and 121 is allowed to exit throughhole 123. An angled groove 124 is cut into the forward end portion 122of nozzle body 119.

A nozzle cap 125 is received by nozzle body 1 19. External threads 126of nozzle body 119 and internal threads 127, not shown. of cap 125 mateso that cap 125 can be screwed down onto body 119. As liquid is forcedthrough bores 113 and 121 and exits hole 123, the liquid is swirledaround and is forced out through groove 124. The liquid then exitsnozzle assembly 16 through opening 128 in cap 125. The distance that capis screwed down on body 119 determines whether the liquid emerges as aspray or as a stream. Adjustment of cap 125 adjusts the liquid pattern.

Handle 24 has a recessed area 18 molded therein so that tube 14 can bewound around handle 24 and stored in recessed area 18. When tube 14 iswound as described, rigid tube 100 is clamped to unit 10 by means of asuitable clamp 19 so that the unit 10 can be held in one hand andoperated as a fixed positioned spray. Another and more usual operatingposition is that where tube 14 is unwound and wand assembly 15 is heldin the operators one hand while the handle 24 is held in the operator'sother hand.

An alternative arrangement of nozzle 16 is that of nozzle assembly (seeFIG. 12). This nozzle assem bly is designed for spraying purposes onlyand does not incorporate the refill feature of nozzle 16. For this application, the two-way control switch 25 can be replaced by a one-waycontrol switch and a unidirectional motor can be substituted for motor59. Nozzle 140 has a collar 141 which receives rigid tube 100. Col lar141 has a central bore 142 which, in nozzle as sembly 16, has a taperedportion 143 which seats a ball 144 to cover bore 142a. Ball 144 is heldin place against tapered portion 143 by a coil spring 145 until pressureis great enough to compress spring 145 and allow liquid to flow pastball 144. Nozzle body 146 is threadably secured to collar 141. A centralbore 147 aligns with bore 142 of collar 141. The operating pressure ofspring 145 and the diameters of ball 144 and bore 14211 are selected aspreviously explained such that the pump will be primed before sprayingcommences and such that the pressure required to force ball 144 open issubstantially higher than the pressure required to keep it open. Bore147 receives spring 145 and retains the same in place while permittingliquid to flow through bore 147. Bore 147 terminates at elongated hole148 as in nozzle 16. Liquid exits bore 147 through hole 148 and travelsover angled groove 149 of body 146. A nozzle cap 150 is threadablyadjustably received by nozzle body 146. Cap 150 has an opening 151through which the liquid exits.

In using sprayer 10, container 11 must first be filled with the desiredliquid. Using the preferred embodiment, nozzle 16 is set for refillingby sliding collar 106 rearwardly on nozzle body 107 and by depressingswitch 25 and moving it rearwardly which causes motor 59 to be reversedand in effect reverses pump 13. This, as previously described, allowsliquid to enter passage way 112 and to be drawn through nozzle 16 intocontainer 11. Once filled, collar 106 is slid back to its forwardmostposition. Unit 10 can now be used as a sprayer by depressing switch 25and moving it forward causing motor 59 to drive pump 13 and draw liquidthrough pump 13 once it has primed itself. Nozzle cap 125 is adjusted sothat the desired spray pattern is achieved. By releasing switch 25,liquid flow is stopped instantly without the usual dripping of liquid.

In using the alternative embodiment nozzle 140, sprayer 10 is filled byremoving housing 12 from container l1 and filling the container 11manually. Hous ing 12 can be removed from container 11 by a simpleone-quarter turn of housing 12 which frees guides I30, 13 l 132 ofhousing 12 from slots 133, 134., 135 of container 11. Once container 11is filled, guides 130, 131, 132 are aligned with slots 133, 134, 135 anda reverse one-quarter turn is used to lock the housing 12 in place oncontainer ll. Tapered container cup 47, as previously described,provides a tight seal between opening 17 and cup 47. Switch 25 isdepressed, pushed forward and held in this position so that pump l3primes itself and then begins to spray the liquid, Once switch 25 isreleased, it returns to its neutral or off position and spraying ceasesinstantly without any dripping as has heretofore been the case.

To generally illustrate the character of one embodiment of theinvention, motor 59 operated with a no load speed of 10,000 rpm. andwith a speed at maximum power of 5,000 rpm. Check valve balls 93 and 116were 0.250 inches in diameter and nozzle check valve springs H7 and 145had a spring rate of0.4lb./in. The diameter of the opening 94 was 0.04inches and the diameter of the bores 113a and 142a were 0.200 inches,the pump gears were approximately 0.344 inches in outside diameter and0.375 inches in length and with nine teeth each.

What is claimed is:

l. A portable cordless apparatus for disbursing a liquid under pressurefor spraying, and the like, compris ing:

a. an integral molded housing having an upper horizontal handle-shapedcompartment, a base portion with an open bottom appended below saidhandle compartment, and a lower cup-shaped compartment having an opentop end secured to and centrally of said base portion;

b. a liquid container formed by side, bottom and top walls, said topwall being formed to centrally mount said base portion and having acentral opening to receive said cup compartment for suspension withinsaid container during normal operation;

c. locking means for releasably locking said liquid container to saidbase portion with said cup compartment so suspended;

d. a pump having a battery powered motor and mounted within said cupcompartment, said pump having an inlet pipe extending through the wallof said cup compartment and terminating within said container proximatesaid container bottom wall, having an outlet pipe terminating externallyof said housing, said pump further having bypass piping connected tobypass fluid from the outlet side of said pump to said container andincluding a check valve with a ball free to move between open and closepositions dependent on the pressure developed at said pump outlet side;

e. battery means mounted in said cup compartment;

f. a manual control switch mounted in said handle compartment and havingconnected wiring extending through said handle compartment and baseportion to said cup compartment enabling said switch to connect saidbattery means to said pump motor and thereby operate said pump;

g. circuit means mounted in said housing and adapting said battery meansto be connected to external charging means; and

h. conduit means connected to said outlet pipe and adapted to disbursesaid liquid through a nozzle in some predetermined pattern, said nozzleincluding a spring loaded ball check valve therein, said bypass pipingcheck valve and nozzle check valve being designed with operatingpressures such that said pump operates through said piping and bypassvalve until fully primed and after priming develops sufficient pressureto open said nozzle check valve and maintain said nozzle check valveopen so long as but only so long as said pump operates.

2. An apparatus as claimed in claim 1 wherein said conduit meanscomprises:

a. a flexible conduit connected to said pump outlet pipe and extendingtherefrom; and

b, a wand assembly providing a handle member, a rigid conduit portionconnected at one end to said flexible conduit, and a liquid dispensingnozzle connected at an opposite end of said flexible con duit forcontrolling the dispensing and spray pattern of said liquid.

3. The apparatus of claim I wherein said locking means comprises matinglocking flanges formed respectively in said base portion and on saidcontainer top wall and adapted to provide locking and unlocking bypartial rotation of said housing relative to said container.

4. The apparatus of claim 1 wherein said pump comprises a pair of motordriven intermeshed gears, a pressure plate arranged to contact one endof said gears and spring means arranged to maintain said plate in saidcontact.

5. The apparatus of claim 2 wherein said pump comprises a reversiblepump, said nozzle is operable bidirectionally and said switch isarranged to selectively connect said pump for operating for eithercorresponding direction thereby enabling said container to be refilledby reversing said pump and drawing fluid through said nozzle.

6. The apparatus of claim 1 wherein said cup compartment comprises acup-shaped vessel adapted to be releasably secured to and within saidbase portion and said container is adapted to be releasably secured toand within said base portion with the respective securement of thevessel being independent of the respective securement of the container.

1. A portable cordless apparatus for disbursing a liquid under pressurefor spraying, and the like, comprising: a. an integral molded housinghaving an upper horizontal handleshaped compartment, a base portion withan open bottom appended below said handle compartment, and a lowercup-shaped compartment having an open top end secured to and centrallyof said base portion; b. a liquid container formed by side, bottom andtop walls, said top wall being formed to centrally mount said baseportion and having a central opening to receive said cup compartment forsuspension within said container during normal operation; c. lockingmeans for releasably locking said liquid container to said base portionwith said cup compartment so suspended; d. a pump having a batterypowered motor and mounted within said cup compartment, said pump havingan inlet pipe extending through the wall of said cup Compartment andterminating within said container proximate said container bottom wall,having an outlet pipe terminating externally of said housing, said pumpfurther having bypass piping connected to bypass fluid from the outletside of said pump to said container and including a check valve with aball free to move between open and close positions dependent on thepressure developed at said pump outlet side; e. battery means mounted insaid cup compartment; f. a manual control switch mounted in said handlecompartment and having connected wiring extending through said handlecompartment and base portion to said cup compartment enabling saidswitch to connect said battery means to said pump motor and therebyoperate said pump; g. circuit means mounted in said housing and adaptingsaid battery means to be connected to external charging means; and h.conduit means connected to said outlet pipe and adapted to disburse saidliquid through a nozzle in some predetermined pattern, said nozzleincluding a spring loaded ball check valve therein, said bypass pipingcheck valve and nozzle check valve being designed with operatingpressures such that said pump operates through said piping and bypassvalve until fully primed and after priming develops sufficient pressureto open said nozzle check valve and maintain said nozzle check valveopen so long as but only so long as said pump operates.
 2. An apparatusas claimed in claim 1 wherein said conduit means comprises: a. aflexible conduit connected to said pump outlet pipe and extendingtherefrom; and b. a wand assembly providing a handle member, a rigidconduit portion connected at one end to said flexible conduit, and aliquid dispensing nozzle connected at an opposite end of said flexibleconduit for controlling the dispensing and spray pattern of said liquid.3. The apparatus of claim 1 wherein said locking means comprises matinglocking flanges formed respectively in said base portion and on saidcontainer top wall and adapted to provide locking and unlocking bypartial rotation of said housing relative to said container.
 4. Theapparatus of claim 1 wherein said pump comprises a pair of motor drivenintermeshed gears, a pressure plate arranged to contact one end of saidgears and spring means arranged to maintain said plate in said contact.5. The apparatus of claim 2 wherein said pump comprises a reversiblepump, said nozzle is operable bidirectionally and said switch isarranged to selectively connect said pump for operating for eithercorresponding direction thereby enabling said container to be refilledby reversing said pump and drawing fluid through said nozzle.
 6. Theapparatus of claim 1 wherein said cup compartment comprises a cup-shapedvessel adapted to be releasably secured to and within said base portionand said container is adapted to be releasably secured to and withinsaid base portion with the respective securement of the vessel beingindependent of the respective securement of the container.